Solar Generators for Homes: 4 Whole-House Backup Systems Compared
Off-grid power editor
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Updated
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This guide is for people who have already decided a battery should carry the house rather than a single appliance, and who want to know how close these systems really get. We compared four units on the four specifications that decide whole-house performance: rated capacity against a household's daily kilowatt-hours, expansion ceiling, inverter voltage, and how fast each one refills from the wall and from solar. We did not test any of these units, and every review states exactly what its recommendation is based on. What you get here is the division nobody else does, the difference between backing a house and backing the circuits that matter, and an honest statement about the one unit on this page that cannot do either.
Can a solar generator back up a whole house?
Only the Anker SOLIX F3800 comes close, because it is the one unit here that outputs 240V split phase and expands to 26.9kWh, which is roughly nine tenths of an average household's daily use. Every other unit on this page covers essential circuits, not a house, and that is a different purchase with a different budget.
Key takeaways
- An average US household uses a little under 30kWh a day, so divide any capacity figure by that before believing the phrase whole house
- Inverter voltage rules units in or out before capacity matters, because no 120V system starts a 240V well pump, range or air handler at any wattage
- For whole-house buyers the expansion ceiling is more important than base capacity, since the head unit is only the first stage
- Recharge speed converts into hours of runtime bought per hour on the wall, which is the figure that decides an intermittent outage
- Watt-hours per pound varies by 78 percent across this shortlist, so the biggest unit is not always the sensible one
Our picks at a glance
Every unit below wins a specific situation rather than a place in a ranking. Pick the row that matches how you will actually use it.
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Best for 240V circuits and panel-level backup
Anker SOLIX F3800
Households on a well, with an electric range or a central air handler, that want the battery wired into the panel and are prepared to add expansion batteries.
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Best for growing into multi-day coverage
BLUETTI AC200L
Buyers who want a 120V system that can be grown in stages as budget allows, in a house with gas heat and municipal water.
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Best for one-person handling at 2000Wh
Jackery Explorer 2000 v2
Households where the backup unit has to be carried between floors or rooms, and anyone protecting a computer or network gear that must not reboot.
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Best for keeping the fridge and the router alive as a first stage
EcoFlow DELTA 3 Plus
Buyers who cannot fund a full system yet and want a first stage that keeps the fridge and the internet alive while expanding later.
How they compare
Scroll the table sideways to see every column.
| Product | Where to buy | Award | Capacity | AC output | Expandable | AC recharge time | UPS switchover | Weight | Battery chemistry | Best for |
|---|---|---|---|---|---|---|---|---|---|---|
| Anker SOLIX F3800 | Best for 240V circuits and panel-level backup | 3840Wh | 6000W | Yes, to 26.9kWh with expansion batteries | About 1.5 hours to full | Under 20ms | 132 lb (60 kg) | LiFePO4 | Households on a well, with an electric range or a central air handler, that want the battery wired into the panel and are prepared to add expansion batteries. | |
| BLUETTI AC200L | Best for growing into multi-day coverage | 2048Wh | 2400W | Yes, to 8192Wh with expansion batteries | 0-80% in 45 minutes (2400W AC input) | -- | 61.41 lb (27.9 kg) | LiFePO4 | Buyers who want a 120V system that can be grown in stages as budget allows, in a house with gas heat and municipal water. | |
| Jackery Explorer 2000 v2 | Best for one-person handling at 2000Wh | 2042Wh | 2200W across 3 AC ports | -- | 66 minutes to 80% | 20ms | 39.5 lb (17.9 kg) | LiFePO4 | Households where the backup unit has to be carried between floors or rooms, and anyone protecting a computer or network gear that must not reboot. | |
| EcoFlow DELTA 3 Plus | Best for keeping the fridge and the router alive as a first stage | 1024Wh | 1800W | Yes, up to 5kWh with DELTA 3, DELTA Pro 3 or DELTA 2 Max battery packs | 40 minutes to 80% on 1500W AC input | 10ms | 27 lb (12.2 kg) | LiFePO4 | Buyers who cannot fund a full system yet and want a first stage that keeps the fridge and the internet alive while expanding later. |
The full reviews
Best for 240V circuits and panel-level backup
Anker SOLIX F3800
Anker
This is the only unit on the shortlist that can feed a panel rather than an extension cord, because it is the only one that outputs 120V and 240V split phase. Its 26.9kWh expansion ceiling is also the only figure here that comes close to a full day of ordinary household consumption. You pay for that in 132 lb and in an electrician's invoice.
What we like about the Anker SOLIX F3800
- 120V and 240V split-phase output covers well pumps, ranges and air handlers that no 120V unit can start
- 6000W AC output leaves headroom to run several large appliances at the same time rather than one at a time
- Expandable to 26.9kWh, which is roughly a full day of average household consumption rather than a few hours
- 2400W solar input is enough to replace a day of essential-circuit use in a single good day of sun
- 3,000 cycles to 80% means daily cycling for years before capacity loss becomes noticeable
Where it falls short for the Anker SOLIX F3800
- At 132 lb it is a two-person lift off the wheels, so the spot you first put it in is effectively where it lives
- Panel-level backup needs a transfer switch fitted by an electrician, which is a separate cost the product page never mentions
- The 3840Wh base unit is only about an eighth of average daily household use, so whole-house coverage means buying expansion batteries too
- Filling its 2400W solar input needs nameplate panel wattage well above 2400W once heat, angle and wiring losses are counted, which is roof or ground space most buyers have not planned for
Key specifications
- Capacity
- 3840Wh
- AC output
- 6000W
- Ports
- 13 total, including 30A RV and 120V/240V split phase
- Max solar input
- 2400W
- Expandable
- Yes, to 26.9kWh with expansion batteries
- Weight
- 132 lb (60 kg)
Every other unit on this page powers appliances. This one can power circuits, and that single difference is what the whole-house search is actually about.
What 240V buys and who does not need it
A deep-well submersible pump, an electric range, a dryer and a central air handler are 240V split phase. A 120V inverter cannot start them at any wattage, so no amount of capacity in a 120V unit closes that gap. The F3800 is the only unit here that outputs both, which makes it a shortlist of one for anyone on a well.
If your water comes from a municipal main and your heat is gas, that capability is something you will pay for and never switch on. Read the other three reviews instead.
The arithmetic that decides the purchase
Average US household electricity use is a little under 30kWh a day. Put the F3800’s rated 3840Wh against that and the base unit holds roughly an eighth of a normal day. That is the number the phrase “whole house” tends to hide.
Two things change it. First, expansion: the 26.9kWh ceiling is about 0.9 of an average day, which is genuine whole-house coverage for a full outage day. Second, load shedding. Assume a realistic essential-circuit bundle of a fridge averaging 150W across its compressor duty cycle, 60W of LED lighting, a 20W router and 50W of device charging, so 280W continuous. The base 3840Wh covers that for 13.7 hours. The expanded 26.9kWh covers it for about 96 hours, or four days.
So the honest framing is: whole house for a day, or the circuits that matter for four.
Refilling it
The 1.5-hour recharge to full works out at roughly 2,560Wh restored per hour on the wall. Against the 280W essentials bundle, an hour plugged in buys about nine hours of runtime, which is the highest ratio on this page and the reason it survives an intermittent grid well.
Solar is where it separates from the rest. The rated 2400W input across five peak sun hours is 12kWh before losses. Derate a quarter for panel temperature, angle and controller losses and you are near 9kWh a day, comfortably above the 6.7kWh that the essentials bundle consumes. That is the point at which a battery stops being a buffer and starts being a supply.
Where it stops making sense
At 132 lb, the wheels are for repositioning on a garage floor, not for carrying it anywhere. Owner reports are consistent that gravel, grass and a single step all defeat them. Decide where it will live before you buy, because moving it is a project.
And if you never wire in a transfer switch, you have bought a very heavy extension-cord hub. The 240V output does nothing until an electrician connects it to something.
- Best for
- Households on a well, with an electric range or a central air handler, that want the battery wired into the panel and are prepared to add expansion batteries.
- Choose something else if
- Your outage plan is a fridge, a router and some lamps, or you have nowhere on a flat, hard floor to park 132 lb permanently.
Best for growing into multi-day coverage
BLUETTI AC200L
BLUETTI
The AC200L is the unit to buy when you want to start at a sensible size and end up somewhere serious. Its 8192Wh expansion ceiling is four times its own base capacity, and its 45-minute refill to 80% is the fastest recovery on this shortlist. What it does not do is 240V, so it covers appliances rather than circuits.
What we like about the BLUETTI AC200L
- Expandable to 8192Wh, which turns a one-evening unit into roughly a day and a quarter on essential circuits
- 0-80% in 45 minutes puts back more watt-hours per hour on the wall than any other 120V unit here
- 2400W AC output starts a full-size fridge compressor and still leaves room for a microwave or a sump pump
- 1200W solar input is high enough to replace most of a day of essential-circuit use in good sun
- The 30A RV port lets one cord carry a large load instead of splitting it across household outlets
Where it falls short for the BLUETTI AC200L
- 120V only, so a well pump, an electric range or a central air handler stays dark no matter how many expansion batteries you add
- At 61.41 lb it is 22 lb heavier than the Jackery Explorer 2000 v2 for six more watt-hours, which is a poor trade if you plan to move it
- The published specifications list no UPS switchover figure, so this is not the unit to protect a desktop or a home server
- Reaching the 8192Wh ceiling means quadrupling the base capacity with extra battery modules, each one a separate purchase and another box needing floor space
Key specifications
- Capacity
- 2048Wh
- AC output
- 2400W
- Expandable
- Yes, to 8192Wh with expansion batteries
- AC recharge time
- 0-80% in 45 minutes (2400W AC input)
- Max solar input
- 1200W
- Weight
- 61.41 lb (27.9 kg)
Most people buying for whole-house backup cannot spend the whole budget at once. The AC200L is built for exactly that situation, and its expansion path is the reason it earns a place here rather than its base capacity.
Base capacity is the wrong number to judge it on
2048Wh sounds like a lot until you divide it by something real. Take an essential-circuit bundle of a fridge averaging 150W across its compressor duty cycle, 60W of lighting, a 20W router and 50W of device charging, so 280W continuous. The AC200L covers that for 7.3 hours. On the fridge alone it is 13.7 hours.
That is an evening and a night, not a whole house. The ceiling is what changes the picture: 8192Wh against the same 280W is 29 hours, and against the fridge alone it is well over two days. You buy the head unit for what it becomes, not what it is on day one.
The recharge figure matters more than it looks
Outages rarely arrive as one clean block. Power returns for half an hour, drops, comes back for two. Whether you can use those windows depends on how fast the unit drinks.
At 0-80% in 45 minutes, the AC200L restores about 1,638Wh in three quarters of an hour, or roughly 2,184Wh per hour. Against the 280W bundle, one hour on the wall buys 7.8 hours of runtime. The Jackery Explorer 2000 v2, at 66 minutes to 80% on almost identical capacity, buys 5.3. Over a day of flickering supply that difference compounds into hours of coverage.
Solar, honestly
The rated 1200W input across five peak sun hours is 6kWh before losses. Take a quarter off for panel temperature, imperfect angle and controller losses and you land near 4.5kWh a day. The essentials bundle above consumes 6.7kWh a day.
So a full solar array on this unit covers roughly two thirds of an essential-circuit day. That is a meaningful contribution to a long outage, and it is not self-sufficiency. Anyone planning to ride out a week on sun alone needs the F3800’s 2400W input instead.
The line it will not cross
No expansion battery adds 240V. If your water comes from a well, the AC200L can run every light in the house and still leave you without a shower. Check what is on your 240V breakers before you compare capacity numbers at all.
- Best for
- Buyers who want a 120V system that can be grown in stages as budget allows, in a house with gas heat and municipal water.
- Choose something else if
- You are on a well or have an electric range, or you need sub-20ms handover to keep a computer or home server running through a cut.
Best for one-person handling at 2000Wh
Jackery Explorer 2000 v2
Jackery
At 39.5 lb for 2042Wh, this is 51.7 watt-hours per pound, comfortably the best ratio on the page and the only 2000Wh-class unit here a single adult can carry upstairs. It also publishes a 20ms handover, so it doubles as a desk-side uninterruptible supply. The catch is that what you buy is what you keep: there is no expansion path at all.
What we like about the Jackery Explorer 2000 v2
- 2042Wh in 39.5 lb works out at 51.7Wh per pound, against 33.3 for the AC200L and 29.1 for the F3800
- 20ms UPS switchover is fast enough that a desktop, a router or a home server does not reboot when the grid drops
- 2200W across three AC ports starts a full-size fridge compressor with headroom for a second appliance
- LiFePO4 cells and a 5-year manufacturer warranty suit a unit that will sit on standby for most of its life
- Light enough to move between the kitchen and a bedroom during an outage rather than committing to one room
Where it falls short for the Jackery Explorer 2000 v2
- No expansion battery support, so 2042Wh is a hard ceiling and a multi-day outage means buying a second complete unit
- 120V only, which rules out well pumps, electric ranges and central air handlers entirely
- 66 minutes to 80% is the slowest refill here, buying 5.3 hours of essential-circuit runtime per hour on the wall against the AC200L's 7.8
- The published specification lists no maximum solar input, so you cannot size an array against a manufacturer figure the way you can with the F3800 or AC200L
Key specifications
- Capacity
- 2042Wh
- AC output
- 2200W across 3 AC ports
- Weight
- 39.5 lb (17.9 kg)
- UPS switchover
- 20ms
- AC recharge time
- 66 minutes to 80%
- Warranty
- 5 year manufacturer
The 2000Wh class is normally a two-person lift. This one is not, and that is the whole reason it is here.
The number the listings bury
Divide capacity by weight and the shortlist separates cleanly. The Explorer 2000 v2 gives 2042Wh in 39.5 lb, which is 51.7Wh per pound. The BLUETTI AC200L holds six more watt-hours in 61.41 lb, or 33.3Wh per pound. The Anker SOLIX F3800 is 29.1Wh per pound.
Put plainly: the AC200L asks you to carry 22 extra pounds for six extra watt-hours. If the unit is going to sit in one place forever, that does not matter. If it has to come up from a basement, or move from the kitchen to a bedroom where someone uses a CPAP machine, it matters a great deal.
What it actually covers
Assume the same essential-circuit bundle used throughout this guide: a fridge averaging 150W across its compressor duty cycle, 60W of lighting, a 20W router and 50W of charging, so 280W continuous. 2042Wh covers that for 7.3 hours. On the fridge alone it is 13.6 hours.
That is an overnight outage handled comfortably and a two-day outage not handled at all. Which brings us to the real limitation.
No expansion path is a bigger problem than it sounds
The other three units on this page all grow. The F3800 reaches 26.9kWh, the AC200L 8192Wh, the EcoFlow DELTA 3 Plus 5kWh. This one stops at 2042Wh forever.
For whole-house buyers that is the decisive fact. If your reason for reading this page is a multi-day outage, this unit answers it only by being bought twice, and two units cannot pool their capacity the way an expansion battery does. Buy it because it is the 2000Wh unit you can actually lift, not because you expect it to scale.
The handover figure earns its keep
20ms is quick enough that a desktop power supply rides through the gap. If you work from home, that turns the unit from outage equipment into something that does a job every time the grid flickers, not just twice a year. The AC200L publishes no handover figure at all, so it cannot be relied on for that role.
Just remember the 120V ceiling. A well pump does not care how fast the handover is if the inverter cannot produce the voltage to start it.
- Best for
- Households where the backup unit has to be carried between floors or rooms, and anyone protecting a computer or network gear that must not reboot.
- Choose something else if
- You are planning coverage measured in days, because there is no expansion path and the only way up is a second unit.
Best for keeping the fridge and the router alive as a first stage
EcoFlow DELTA 3 Plus
EcoFlow
Let us be blunt: 1024Wh cannot back a whole house, and nothing in this review will pretend otherwise. What the DELTA 3 Plus does is give a realistic budget a starting point that is not a dead end, because it expands to 5kWh and carries a 1800W inverter and a 10ms handover from day one. Buy it as the first stage of a system, not as the system.
What we like about the EcoFlow DELTA 3 Plus
- Expandable to 5kWh with DELTA 3, DELTA Pro 3 or DELTA 2 Max packs, so the first purchase is not wasted when the budget allows more
- 1800W inverter starts a full-size fridge compressor despite the small pack, which units of this capacity often cannot
- 10ms UPS switchover is the fastest on this page and keeps a desktop or home server alive through a cut
- 40 minutes to 80% means it can refill inside a short grid window during an intermittent outage
- 4,000 cycles to 80% and 27 lb make it easy to justify keeping in daily use rather than leaving it on a shelf
Where it falls short for the EcoFlow DELTA 3 Plus
- At 1024Wh it holds about three and a half percent of an average household's daily electricity use and covers a fridge, lights, a router and charging for only 3.7 hours, so it cannot back a whole house and should never be bought expecting that
- The specifications we hold publish no maximum solar input, so you cannot size a panel array against a manufacturer figure the way you can with the F3800's 2400W or the AC200L's 1200W
- 120V only, so 240V well pumps, electric ranges and central air handlers are permanently out of scope
- Reaching the 5kWh ceiling means adding separate battery packs from EcoFlow's own range, so the finished system is a much larger commitment than the head unit suggests
Key specifications
- Capacity
- 1024Wh
- AC output
- 1800W
- Expandable
- Yes, up to 5kWh with DELTA 3, DELTA Pro 3 or DELTA 2 Max battery packs
- AC recharge time
- 40 minutes to 80% on 1500W AC input
- UPS switchover
- 10ms
- Rated cycle life
- 4,000 cycles to 80%
This is the one unit here that does not belong in a whole-house comparison on capacity, and it is on the page anyway because most people searching for whole-house backup are not going to spend whole-house money this year.
Say the quiet part first
Average US household electricity use is a little under 30kWh a day. The DELTA 3 Plus holds 1024Wh. That is roughly three and a half percent of a normal day. It will not back a house, it will not back most of a house, and any listing that implies otherwise is counting on you not doing the division.
Against a realistic essential-circuit bundle, a fridge averaging 150W across its compressor duty cycle plus 60W of lighting, a 20W router and 50W of charging, so 280W continuous, it lasts 3.7 hours. On the fridge alone, 6.8 hours.
Why it still earns a place
Because the alternative most budget buyers take is a unit that cannot start their fridge and cannot be added to. This one does both.
The 1800W inverter is the important spec. A compressor pulls a large surge for a fraction of a second at start-up, and that surge is what trips underrated inverters. 1800W in a 1024Wh unit is unusually generous, and it means the pack runs out of energy rather than failing to start the load, which is the failure mode you can plan around.
The expansion ceiling is the other reason. 5kWh against the 280W bundle is 17.9 hours, which is a genuine overnight-plus outage. You get there in stages instead of one purchase.
What the recharge rate buys
80 percent of 1024Wh in 40 minutes is about 1,229Wh restored per hour on the wall. Against the 280W bundle, an hour plugged in buys 4.4 hours of runtime. That is the lowest figure here in absolute terms, but the pack is so small that it refills completely inside most grid windows, which the bigger units do not.
The trap to avoid
The head unit is the small part of the commitment. Getting from 1024Wh to 5kWh means adding roughly four times the head unit’s own energy in separate packs, and each one is another purchase and another box on the floor. Cost the whole path before you start, because the finished system is a very different proposition from the unit you begin with. Start here because you want something working before the next storm, not because you assume it is the shortest route to a large system.
- Best for
- Buyers who cannot fund a full system yet and want a first stage that keeps the fridge and the internet alive while expanding later.
- Choose something else if
- You need the house covered this hurricane season, or you are counting on it to carry more than a few essential loads through a night.
How we researched this guide
Four units were compared using published manufacturer specifications and aggregated owner reports. None were tested by us. Every runtime, watt-hours per pound and solar figure on this page is arithmetic performed on rated specifications against a stated load, and each review names the sources it relies on and the limits of that assessment.
The full process is on our how we test portable power stations page, including what counts as hands-on use.
- Units evaluated
- 4
- Used hands-on
- 0
- Assessed from documentation and owner reports
- 4
Evaluation methods used: documentation and owner-report research, specification comparison, editorial selection
Which one should you buy?
Match your situation on the left to the recommendation on the right.
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You are on a well, or have an electric range or a central air handler
Recommendation: Buy the Anker SOLIX F3800, the only unit here with 240V split-phase output
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You want whole-house coverage but need to build it in stages
Recommendation: Start with the BLUETTI AC200L and add expansion batteries toward its 8192Wh ceiling
-
The unit has to be carried between floors or moved during an outage
Recommendation: Buy the Jackery Explorer 2000 v2 at 51.7Wh per pound, and accept that 2042Wh is its permanent ceiling
-
You need a desktop or home server to survive the cut without rebooting
Recommendation: Buy the EcoFlow DELTA 3 Plus for its 10ms switchover, or the Jackery Explorer 2000 v2 at 20ms
-
You cannot fund a full system yet but want something working before the next storm
Recommendation: Buy the EcoFlow DELTA 3 Plus and expand toward 5kWh later, knowing 1024Wh covers essentials for under four hours
Mistakes buyers make
- Buying on rated watt-hours without ever dividing them by the household's actual daily kilowatt-hour consumption
- Assuming an expansion battery can add 240V output to a 120V unit, which no expansion battery on any of these systems does
- Planning panel-level backup without budgeting for the transfer switch and the electrician who has to fit it
- Sizing a solar array from the panel wattage on the box rather than from realistic peak sun hours and a derating for heat and angle
- Choosing a unit with no expansion path because the base capacity looked adequate, then discovering the only way up is a second complete unit
- Treating manufacturer runtime charts as outage planning when they assume a constant low draw rather than a compressor duty cycle
Our final recommendation
If you want one answer rather than a shortlist, this is the unit that suits the widest range of readers in this category.
Best for 240V circuits and panel-level backup
Households on a well, with an electric range or a central air handler, that want the battery wired into the panel and are prepared to add expansion batteries.
Questions buyers ask
Is a solar generator better than a gas standby generator for a house?
They solve different problems. A battery produces no exhaust so it can sit indoors, needs no fuel run during a storm and makes no noise, but it holds a fixed amount of energy. A gas standby unit runs as long as fuel arrives. For outages measured in hours to a couple of days, a battery is usually the better fit. For a week without power, fuel still wins unless you have serious solar.
How many solar panels do I need to keep one of these charged?
Work backwards from the unit's rated maximum input, not from a panel count. The F3800 accepts 2400W and the AC200L 1200W, and a panel only reaches its rated wattage in ideal conditions. Filling the input takes noticeably more nameplate panel wattage than the input figure suggests once heat, angle and wiring losses are accounted for.
Do I need an electrician to connect one of these to my house?
Only if you want it to feed circuits rather than appliances. Running extension cords from any of these units is a plug-in job with no wiring involved. Feeding a panel or a critical loads subpanel means a transfer switch, and that is permitted electrical work in most jurisdictions.
How long will these last before the battery wears out?
All four use LiFePO4 cells, which is the chemistry that gets rated in thousands of cycles rather than hundreds. Two of the four publish a figure we hold: the F3800 at 3,000 cycles to 80 percent and the DELTA 3 Plus at 4,000. BLUETTI and Jackery do not state one in the specifications we work from, so treat their cycle life as unknown rather than assumed. Either way, a backup unit cycled a handful of times a year will age on the calendar long before it runs out of cycles.
Will these still work if the outage happens in winter?
They work, but with less capacity. Every lithium chemistry delivers less in the cold, and LiFePO4 packs also refuse to charge below freezing to protect the cells. A unit stored in an unheated garage through a January storm may deliver noticeably below its rating and may not accept a charge until it warms up.
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